Electric-light fixture.



C. W. KlNG. ELECTRIC LIGHT HXTURE.

APPLICATlON FlLED OCT-1,1913- Patented Jan. 23, 1917.

' CYRIL w. KING, or oswneo, new YORK.

ELECTRIC-LIGHT FIXTURE.

Application filed October 1, 1913.

To all whom it may concern:

Be it known that I, CYRIL W. KING, a citizen of the United States of America, residing at Oswego, in the county of Oswego, in the State of New York, have invented new and useful Improvements in Electric- Light Fixtures, of which the following,

taken in connection with the accompanying drawings, is a. full, clear, and exact description.

This invention relates to certain improvements in supports for electric light fixtures adapted to be secured to and suspended from the ceiling or walls of a building for conduit or open wiring and refers more particularly to the connection between the tubular arm or arms through which the wires'are passed to the lamps and the head for receiving and supporting such arm or arms. These heads are made in various forms for drop or wall fixtures according to the class ofwiring installed-that is whether open wiring or conduit work-but in the present system ofwiring most commonly employed, the connections between the tubular fixture arms and supporting head therefor are made by threading both parts and securing one part into the other after the electric wires have been drawn through the tubular arms or fixtures.

Aside from the expense of cutting the threads in or upon both parts, it is necessary to rotate the tubular arm several turns in securing it into the head which not only tends to twist the wires andstrain their terminalconnections with the lamp sockets but fre quently strips the insulation from said wires, thereby increasing the liability of short circuits and consequent imperfect service if not actual danger from fire.

When the sections are coupled and the ends of the fixture wires are properly connected to the feed wires at the junction of the fixture with the head, the coupling and joined ends of the wires are usuallyinclosed within and concealed by ornamental balls or canopies of sheet metal having suitable openings through which the fixture arms are passed, the ornamental shells or fixtures being provided with suitable means for holding them in their adjusted positions and, when the sections are connected by screwing one upon the other, it frequently happens that the tubular fixtures are not cut with suflicient accuracy to allow the inclosing shells to be properly adjusted or when the Specification of Letters Patent.

serial No. 792,902.

shells are made of semi-spherical or similar sectlons adapted to fit one within the other, the adjustment of the imperfectly cut threaded parts one upon the other in securing themin place is more or less liable to buckle one of the shell sections to such an Many of these fixture arms are curved more or less and adapted to be brought to a predetermined position for use and, after screwing them tightly into the head as they should be, they are frequently deflected from their proper positions and when so adjusted are loose and liable to jar out of place.

e mainobject, therefore, of my inven tion is to overcome these difiiculties by providing slip connections between the fixture and its supporting head so that they may be accurately adjusted to any desired position andheld infixed relation without rotating or turning the lamp-supporting arms.

Another object is to reduce the cost of manufacture and to render the operation of assembling the fixtures more expeditious, economical and accurate without liability of stripping the insulation from the wires or deforming the canopies or protective casings which surround the coupling.

Other objects and uses will in the following description.

In the drawings, Figure 1 is a side elevation of one form of my invention as applied to drop fixtures showing the inclosing case in section. Fig. 2 is a topsection, of the same device spherical case is also shown in 3is an enlarged the coupling head for the fixturesshown in Figs. 1 and 2. Fig. 4 is an enlarged transverse sectional view through one of the friction clamps taken on line 4st, Fig. 2.

The drop fixture shown in Figs. 1, 2 and 3, comprises a tubular conduit -1 having its lower end provided with a head screwed or otherwise secured thereon and provided with a plurality of, in this instance three, tubular sockets -3 radiating therefrom and divided through one side at 41 for receiving a corresponding number of tubular lamp fixtures 5.

The split sides of the tubular hubs 3 are provided with laterally projecting ears 6- having registering apertures, one of which is threaded, for receiving clamping screws 7 by which the split hubs may be brought out in which the Patented Jan. 23, 1917.

plan, partly in a section. Fig. 7 vertical sectional view of easy-sliding fitin the-hubs or sockets feed wires which are drawn or threaded through the lamp, fixtures 5- PTGYIOHS tion into their respective sockets 3-..

The inner ends-of the lamp-supporting;

armsor fixtures 5 are fitted'with an when the screws -7 are loosened, thereby establishing a sliding engagement: between said lamp fixtures and head sothat the fix: tures be adjusted by endwise sliding movement to any. desired position and firmly held in such position by the tightening of the screws 7- which compress the corresponding hubs upon the adjacent ends and firmly hold them of the fixtures oin operativeposition, necessity for turning ducing the liability of stripping the insulation on the wires or of straining the terminal connections: of said wires with the lamp sockets or with the feed wires .8 and also avoids any liability of buckling or de' forming portions of the protective hood or casing as a through which the lamp fixtures extend.

The heads of the screws 7--. and also the openings i-9- are preferably on the underside of the head -2 where they are thereby avoiding any easily accessiblefor clampingthelamp fix-V tures and alsofor attaching the ends of the to those which are passed through the lamp-supporting arms, it being understood tlnt the casing a is preferably made in sections so tion may be removed by unscrewing a suitable nut -b on the lower end of a pendant rod 0- which is centrally screwed into the underside of the rod 2 and extends Copies of this patent may be obtained for but is adapted to receive the connections of the feed wires with additional WVHQS -9 v:-1

to {their :1nser than the lower ear -ening the hubs on the arms.

and consequently rethat the lower secdownwardly through an opening in the lower section of the casing.

The central portion of the head -2- is provided with a threaded socket 10- for engaging the-lower threaded end of the upright .tube -1. thereby establishing a positive connection between the head'andits 1 supporting tube The radial hubs or sockets -3- are prefthe inner ends of their spaced apart from the main body to form erably spaced uniform-distances apart and V lower-sides are the openings ,-9 through which the ends of the wires are drawn'in electrically connecting them one to the other.

What I clann s:

1. An, electric light .fixturecomprising a 7, head having a central chamber and radially projecting split hubs ears projecting into such-spaces, the upper ear being of greater cross and extending beneath spaced apart circum ferentially. and pro rvided with y apertured 7 i 1 sectional area the horizontal axis of the hub, lamp-sup;

with the enlarged upper eanengaging the same entirely over its adjacent face and low the transverse axis, of the arm, and bolts tight-V passed through the apertured ears for 2. An. electric light fixture comprisinga headhaving a central chamber andradially projecting split hubs spaced apart circumferential ly and porting arms slidably engagedin said hubs,

provided with apertured H ears projecting intoisuch spaces, lamp sup-;

porting arms slidably engaged in said hubs, one of said to have the inner arm throughout its the apertured ears for ears of each pair being formed end thereof engage the length and past the-3 transverse axis thereof, bolts passed through tightening the hubs on the arms, the portions of the hub between V the arms being extended and united at points above and below the plane of the.

hubs and provided with co-axial threaded sockets, a SL1PpOIft1Dg ,P1p6:SCPGWQCl -1Il the socket, and a case-supporting rod se-.

upper cured inthe lower socket.

In witness whereof I have hereunto setmy;

hand this 25th day of September, 1913.

CYR IL XV. KING.

\Vitnesses :7

H. E. CHASE,

EVA E. GREENLEAI.

Washington, D. C.

five cents each, by addressing ther0ommissidner of Patents", 

